[ He merely nods his approval of her ideas. He has serious apprehensions about returning to the Labyrinth, but he sees the utility of it.

Ah. So they've come to the key. Yu picks it up and turns it over in his hand. ]

This is connected to the mass kidnapping I mentioned. Colonists were taken in groups of four or five to various places. Mine ended up in a prison, which is where we found this.

[ He pauses for a moment. She should know. Yosuke and Rise do. It wouldn't be right if Naoto didn't. As reluctant as he is to share this last piece of information, she deserves to know just how dangerous this world can really be. ]

The prison had a powerful guardian. It took two members of our group by surprise and killed them. [ His voice stays level, but his eyes are on the key. ]

The three of us that remained attacked it, but without realizing, we caused it to overload. It blew up and killed all three of us.

[ He lifts his gaze to meet hers then, still calm, but a little grim, too. ]